Performance of dynamic feedback flow control using VS/VD technique for ABR service in ATM networks

The available bit rate (ABR) service category has been approved by the ATM Forum to make use of bandwidth available after satisfying the requirements of real-time services. Thus, many flow control algorithms have been proposed within the context of the ABR service. We have proposed a dynamic rate-based flow control (DRFC) scheme with the primary goal of supporting the ABR service effectively and with the additional advantage of simplicity. This paper investigates the behaviour of the DRFC scheme in conjunction with virtual source/virtual destination (VS/VD) technique. The performance is evaluated in terms of allowed cell rates, number of transmitted cells, buffer occupancy, and link utilization. It has been observed that the implementation of VS/VD technique improves the performance with minimum buffer requirements.